A copywriter is a person tasked to write the text used for advertisements in magazines, newspapers, television, radio and other kinds of media. A copywriter may also be assigned to come up with the words for press releases, informational or promotional pamphlets, and other promotional materials. A copywriter may also be tasked to rewrite or edit existing materials. Thus, a copywriter's job is a very flexible and potentially exciting career in the wide world of advertising and marketing.